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ajm |
1.1 |
//---PACKAGE DECLARATION--- |
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//---IMPORTS--- |
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tdb |
1.4 |
import uk.ac.ukc.iscream.core.*; |
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ajm |
1.1 |
import org.omg.CORBA.*; |
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import org.omg.CosNaming.*; |
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import org.omg.PortableServer.*; |
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/** |
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* The main class for the CORE of the I-Scream system. |
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* The main method of this class initialises the ORB |
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* and then starts and registers CORE I-Scream services |
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* with the name service. At which point it essentially |
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* finishs its role and the started services continue to |
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* serve requests from the I-Scream system. |
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* |
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tdb |
1.3 |
* @author $Author: tdb1 $ |
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tdb |
1.4 |
* @version $Id: Core.java,v 1.3 2000/11/09 00:54:19 tdb1 Exp $ |
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ajm |
1.1 |
*/ |
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class Core { |
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//---FINAL ATTRIBUTES--- |
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/** |
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* The current CVS revision of this class |
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*/ |
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tdb |
1.4 |
public static final String REVISION = "$Revision: 1.3 $"; |
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ajm |
1.1 |
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//---STATIC METHODS--- |
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/** |
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* The main method which starts the CORE |
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* Currently the args are passed direct to the ORB, |
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* so any ORB paramaters could go there. |
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* |
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* @param args the command line arguments |
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*/ |
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public static void main(String[] args) { |
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tdb |
1.3 |
System.out.println("I-Scream CORE:" + REVISION + ": coming up"); |
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ajm |
1.1 |
try { |
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// start the ORB |
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ORB orb = ORB.init(args, null); |
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// get the Root POA |
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org.omg.CORBA.Object objRef = orb.resolve_initial_references("RootPOA"); |
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POA poa = POAHelper.narrow(objRef); |
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// get a hook to the name service |
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objRef = orb.resolve_initial_references("NameService"); |
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NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef); |
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tdb |
1.3 |
// start and bind each server in turn |
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// create the logger (either Screen or File) |
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ScreenLoggerServant loggerRef = new ScreenLoggerServant(); |
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//FileLoggerServant loggerRef = new FileLoggerServant("core.log"); |
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// and advertise it to the naming context |
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objRef = poa.servant_to_reference(loggerRef); |
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ncRef.bind(ncRef.to_name("iscream.Logger"), objRef); |
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ajm |
1.1 |
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tdb |
1.3 |
// get a ref to the logger servant as a Logger reference |
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Logger logRef = LoggerHelper.narrow(objRef); |
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ajm |
1.1 |
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tdb |
1.3 |
// create the Configurator |
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ConfiguratorServant configuratorRef = new ConfiguratorServant(poa, logRef); |
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// and advertise it to the naming context |
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ajm |
1.1 |
objRef = poa.servant_to_reference(configuratorRef); |
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ncRef.bind(ncRef.to_name("iscream.Configurator"), objRef); |
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// start the POA off |
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tdb |
1.2 |
poa.the_POAManager().activate(); |
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ajm |
1.1 |
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tdb |
1.3 |
// can't have a real toString() :) |
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String toString = "I-Scream CORE:" + REVISION; |
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logRef.write(toString, "started"); |
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ajm |
1.1 |
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// now we are running, we just need to serve |
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// so we ask the orb to block for us until it has finished |
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orb.run(); |
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// if there was a problem then we'll get to here |
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} catch (Exception e) { |
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// there is already another CORE of the same name registered |
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if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) { |
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System.err.println("ERROR: Another I-Scream CORE is already registered under the same name."); |
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// otherwise we don't know what happened |
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// so print the error and do a stack trace |
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} else { |
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System.err.println("CORE ERROR: " + e); |
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e.printStackTrace(System.out); |
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} |
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} |
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} |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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//---PRIVATE METHODS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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//---STATIC ATTRIBUTES--- |
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tdb |
1.2 |
} |
